Product Overview
The Kryptonite Kryptolok Standard U-Lock with Cable is designed to provide robust security for your bicycle. It features a hardened steel shackle and a flexible steel cable, offering comprehensive protection against theft.
Key features include:
- 12.7mm Hardened Performance Steel Shackle: Resists hand tools, bolt cutters, and leverage attacks.
- 10mm Steel Looped Cable: Provides additional security for wheels and accessories.
- Double Deadbolt Anti-Rotation Design: Enhances resistance against twisting leverage attacks.
- Disc-Style Cylinder with Center Keyway: Protected by a vinyl coating, pick and drill resistant, with a sliding dust cover.
- FlexFrame-U Bracket: Allows convenient multi-location U-Lock transport on your bike frame.
- Two Stainless Steel Keys: Ergonomic design to reduce torque and prevent bending or breaking.
Setup
Mounting the FlexFrame-U Bracket
The FlexFrame-U Bracket allows you to carry your U-lock directly on your bicycle frame. Follow these steps for installation:
- Identify a suitable location on your bike frame (e.g., seat tube, down tube) that does not interfere with pedaling or other components.
- Attach the two halves of the FlexFrame-U bracket around the chosen tube.
- Secure the bracket using the provided screws, ensuring it is tight and stable.
- Slide the U-lock into the bracket until it clicks securely into place. Ensure the lock is firmly held and does not rattle during rides.

Image: The FlexFrame-U bracket attached to a bicycle frame, holding the U-lock securely.
Operating Instructions
Securing Your Bicycle with the U-Lock
For maximum security, always aim to lock your bike frame and at least one wheel to a fixed, immovable object.
- Choose a well-lit area with high foot traffic.
- Position your bicycle close to a sturdy, immovable object (e.g., a dedicated bike rack, a solid pole).
- Insert the key into the lock cylinder and turn it to unlock the shackle. Remove one end of the shackle from the crossbar.
- Pass the shackle around your bicycle frame and the rear wheel, then around the immovable object.
- Re-insert the shackle end into the crossbar and turn the key to lock it. Ensure the shackle is tightly fitted, minimizing space for tools.
- Position the lock so the keyway faces downwards, making it harder for thieves to tamper with.

Image: The Kryptonite Kryptolok Standard U-Lock, showing its robust design.
Using the KryptoFlex Cable for Additional Security
The KryptoFlex cable provides an extra layer of security for your front wheel or other accessories.
- Once the U-lock is secured, thread the KryptoFlex cable through your front wheel.
- Loop one end of the cable through the other to create a secure loop.
- Pass the remaining end of the cable through the U-lock shackle before locking it, or secure it directly to the U-lock if space allows.

Image: Close-up of the Kryptonite Kryptolok U-Lock's locking mechanism, highlighting its robust construction.

Image: A bicycle secured with both the Kryptonite Kryptolok U-Lock on the frame and rear wheel, and the KryptoFlex cable through the front wheel.
Maintenance
Regular maintenance ensures the longevity and smooth operation of your Kryptonite lock.
- Lubrication: Periodically apply a small amount of lubricant (e.g., WD-40, Teflon-based lubricant) to the keyway and the shackle ends. This helps prevent sticking and corrosion.
- Cleaning: Keep the lock body and keyway free from dirt and debris. The sliding dust cover helps protect the cylinder, but occasional cleaning is recommended.
- Storage: When not in use, store the lock in a dry place to prevent rust and extend its lifespan.
Troubleshooting
Key is Stiff or Hard to Turn
If your key is difficult to turn or the lock mechanism feels stiff:
- Apply a small amount of lubricant into the keyway.
- Insert and remove the key several times, turning it gently to distribute the lubricant.
- Ensure the key is fully inserted before attempting to turn it.
If the issue persists, contact Kryptonite customer support.
Specifications
| Feature | Detail |
|---|---|
| Brand | Kryptonite |
| Model Number | 001966 KryptoLok STD & KryptoFlex 410 |
| Lock Type | Keyed Lock |
| Shackle Material | 12.7mm Hardened Performance Steel |
| Cable Material | 10mm Braided Steel |
| Interior Locking Dimensions | 4" x 9" |
| Cable Length | 4 ft (122 cm) |
| Weight | 2.91 Pounds |
| Included Components | 2 Stainless Steel Keys, FlexFrame-U Bracket |
Warranty and Support
Limited Lifetime Warranty
The Kryptonite Kryptolok Standard U-Lock with Cable comes with a Limited Lifetime Warranty. For details on warranty coverage and claims, please refer to the official Kryptonite website or contact customer support.
Key Safe Program
Register your keys online with Kryptonite's Key Safe Program. In the event you lose your keys, Kryptonite will ship two replacement keys for free. This program ensures you always have access to your lock.

Image: Details of the Kryptonite Key Safe Program, showing replacement keys.
Anti-Theft Protection Offer (ATPO)
This product is eligible for Kryptonite's Anti-Theft Protection Offer. Register your lock and bicycle to qualify for reimbursement in case your bike is stolen due to the lock being defeated. Terms and conditions apply, including specific security ratings and proper locking techniques. Refer to the Kryptonite website for full details and registration.

Image: Visual representation of the Kryptonite Kryptolok U-Lock's dimensions and security features, including its Sold Secure Bicycle Gold rating.

Image: A chart illustrating Kryptonite's security ratings and recommended usage scenarios for different lock types and environments.





